TODAY | October 18, 2013
avo: get home? getting directions.
>>> we're back at 7:43 with an age old mystery.
>> the big question of the morning, is there really such a creature as a yeti? and if so, what is it? as keir simmons explains, one scientist may have found the answer.
>> reporter: yeti, big foot , call it what you will. an elusive creature set to hide everywhere. he said they didn't exist until he saw one 25 years ago.
>> long hair, they are going on two legs. they are much taller than a huge man.
>> reporter: still many called the yeti a myth until now. one year ago the oxford scientist decided to put it to the test.
>> this is the starting point.
>> reporter: he gathered samples leading to sightings of the creature, like the hair o the creature.
>> if there's anything we will find it.
>> reporter: he tested the dna and he discovered there is a hybrid creature out there. it marched an arctic bear that lived tens of thousands of years ago. it means the yeti maybe a descendent of that animal. a bit like this museum piece .
>> it's a bear.
>> reporter: independent expert sas the theory is reasonable but the professor is still searching because he believes other yetis maybe related to humans.
>> what a discovery it would be to find a lost race of humans in the himalayas.
>> or anywhere else. that's why i'm doing the work.
>> reporter: his quest provided some answers but there's still much that is mysterious about the yeti. the creature of the mountains. for "today," keir simmons , nbc news london.
>> this is big in your house.
>> my kids are obsessed by big foot . i don't know why. they think he lives near our house.
>> wow. real or not real? do you think.
>> i hope it's real because there's so few things unexplained in this world. it would be great to have something you can't actually put your finger on.
>> he's not there right now, he's in scotland riding the loch ness monster .
>> i don't believe but i don't want to ruin it for your kids. i think you and your kids should find out more about this and watch the big foot files at 8:00 eastern and pacific time on national geographic .
>> do you believe?
>> i do think way a long time ago perhaps.
>> but not now.